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Vortex States in Nanosized Superconducting Strips with Weak Links Under an External Magnetic Field

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Abstract

The time-dependent Ginzburg–Landau equations have been solved numerically by a finite element analysis for the nanosized superconducting strips with one central weak link. Anisotropy is included through the spatially dependent anisotropy coefficient ζ in different layers of the sample. For given applied magnetic fields, we have simulated the dynamical behavior of the penetrating magnetic vortices into the superconductor. Our results show the energy barrier for vortices to enter a weak link is smaller than that for vortices to enter superconducting layers. The final distribution of vortices is determined by the competing interactions of vortices with Meissner currents and the weak link boundaries.

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Acknowledgments

This work is sponsored by the Natural Science Foundation of Shanghai (No. 13ZR1417600), the Innovation Program of Shanghai Municipal Education Commission (No. 14YZ132) the Startup Fund for Talented Scholars of Shanghai University of Electric Power (No. K2011-014), and the Shanghai Science Fund for the Excellent Young Teachers (No. Z2012-012).

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Authors and Affiliations

  1. Department of Physics, Shanghai University of Electric Power, Shanghai, 201300, China

    Lin Peng, Jia Lin & Yufeng Zhang

  2. College of Sciences, Tongji University, Shanghai, 200092, China

    Lin Peng

  3. Department of Physics, China Jiliang University, Hangzhou, 310018, China

    Yun Zhou

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  1. Lin Peng
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  2. Jia Lin
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  3. Yun Zhou
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  4. Yufeng Zhang
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Correspondence to Lin Peng.

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Peng, L., Lin, J., Zhou, Y. et al. Vortex States in Nanosized Superconducting Strips with Weak Links Under an External Magnetic Field. J Supercond Nov Magn 28, 3507–3511 (2015). https://doi.org/10.1007/s10948-015-3219-y

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  • DOI: https://doi.org/10.1007/s10948-015-3219-y

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